LEEDS AND NORTHRUP SPEEDOMAX 'H' CHART RECORDER, 1960's

Valve chart recorder, for measuring and recording on paper information collected by sensors sensitive to voltage or current readings, meaning it could record almost any equipment with a sensor attached to it.

Your comments:

• I used to have to sometimes fill one of these up with ink. It was a terrible job! If you got the ink on your hands it took days to wash off. If you got it on your shirt sleeves - well, just forget it, the stains would NEVER wash out.
  .......... Richard, Reading, 9th of August 2010
  
  

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